1 /*
2 * Copyright 2014 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "Benchmark.h"
9 #include "SkBitmap.h"
10 #include "SkCanvas.h"
11 #include "SkColorFilterImageFilter.h"
12 #include "SkColorMatrixFilter.h"
13 #include "SkGradientShader.h"
14 #include "SkImageFilter.h"
15 #include "SkTableColorFilter.h"
16
17 // Chains several matrix color filters image filter or several
18 // table filter image filters and draws a bitmap.
19 // This bench shows an improvement in performance and memory
20 // when collapsing matrices or tables is implemented since all
21 // the passes are collapsed in one.
22
23 class BaseImageFilterCollapseBench : public Benchmark {
24 public:
BaseImageFilterCollapseBench()25 BaseImageFilterCollapseBench() {}
26
27 protected:
doPreDraw(sk_sp<SkColorFilter> colorFilters[],int nFilters)28 void doPreDraw(sk_sp<SkColorFilter> colorFilters[], int nFilters) {
29 SkASSERT(!fImageFilter);
30
31 // Create a chain of ImageFilters from colorFilters
32 for(int i = nFilters; i --> 0;) {
33 fImageFilter = SkColorFilterImageFilter::Make(colorFilters[i], fImageFilter);
34 }
35 }
36
onDraw(int loops,SkCanvas * canvas)37 void onDraw(int loops, SkCanvas* canvas) override {
38 makeBitmap();
39
40 for(int i = 0; i < loops; i++) {
41 SkPaint paint;
42 paint.setImageFilter(fImageFilter);
43 canvas->drawBitmap(fBitmap, 0, 0, &paint);
44 }
45 }
46
47 private:
48 sk_sp<SkImageFilter> fImageFilter;
49 SkBitmap fBitmap;
50
makeBitmap()51 void makeBitmap() {
52 int W = 400;
53 int H = 400;
54 fBitmap.allocN32Pixels(W, H);
55 fBitmap.eraseColor(SK_ColorTRANSPARENT);
56
57 SkCanvas canvas(fBitmap);
58 SkPaint paint;
59 SkPoint pts[] = { {0, 0}, {SkIntToScalar(W), SkIntToScalar(H)} };
60 SkColor colors[] = {
61 SK_ColorBLACK, SK_ColorGREEN, SK_ColorCYAN,
62 SK_ColorRED, 0, SK_ColorBLUE, SK_ColorWHITE
63 };
64 paint.setShader(SkGradientShader::MakeLinear(pts, colors, nullptr, SK_ARRAY_COUNT(colors),
65 SkShader::kClamp_TileMode));
66 canvas.drawPaint(paint);
67 }
68 };
69
70 class TableCollapseBench: public BaseImageFilterCollapseBench {
71 protected:
onGetName()72 const char* onGetName() override {
73 return "image_filter_collapse_table";
74 }
75
onDelayedSetup()76 void onDelayedSetup() override {
77 for (int i = 0; i < 256; ++i) {
78 int n = i >> 5;
79 table1[i] = (n << 5) | (n << 2) | (n >> 1);
80
81 table2[i] = i * i / 255;
82
83 float fi = i / 255.0f;
84 table3[i] = static_cast<uint8_t>(sqrtf(fi) * 255);
85 }
86
87 sk_sp<SkColorFilter> colorFilters[] = {
88 SkTableColorFilter::Make(table1),
89 SkTableColorFilter::Make(table2),
90 SkTableColorFilter::Make(table3),
91 };
92
93 this->doPreDraw(colorFilters, SK_ARRAY_COUNT(colorFilters));
94 }
95
96 private:
97 uint8_t table1[256], table2[256], table3[256];
98 };
99
make_brightness(float amount)100 static sk_sp<SkColorFilter> make_brightness(float amount) {
101 SkScalar amount255 = amount * 255;
102 SkScalar matrix[20] = { 1, 0, 0, 0, amount255,
103 0, 1, 0, 0, amount255,
104 0, 0, 1, 0, amount255,
105 0, 0, 0, 1, 0 };
106 return SkColorFilter::MakeMatrixFilterRowMajor255(matrix);
107 }
108
make_grayscale()109 static sk_sp<SkColorFilter> make_grayscale() {
110 SkScalar matrix[20];
111 memset(matrix, 0, 20 * sizeof(SkScalar));
112 matrix[0] = matrix[5] = matrix[10] = 0.2126f;
113 matrix[1] = matrix[6] = matrix[11] = 0.7152f;
114 matrix[2] = matrix[7] = matrix[12] = 0.0722f;
115 matrix[18] = 1.0f;
116 return SkColorFilter::MakeMatrixFilterRowMajor255(matrix);
117 }
118
119 class MatrixCollapseBench: public BaseImageFilterCollapseBench {
120 protected:
onGetName()121 const char* onGetName() override {
122 return "image_filter_collapse_matrix";
123 }
124
onDelayedSetup()125 void onDelayedSetup() override {
126 sk_sp<SkColorFilter> colorFilters[] = {
127 make_brightness(0.1f),
128 make_grayscale(),
129 make_brightness(-0.1f),
130 };
131
132 this->doPreDraw(colorFilters, SK_ARRAY_COUNT(colorFilters));
133 }
134 };
135
136 DEF_BENCH(return new TableCollapseBench;)
137 DEF_BENCH(return new MatrixCollapseBench;)
138